Now, thanks to a fan petition, officials in the musician’s hometown, Castro Valley, California, have declared February 10 “Cliff Burton Day”—a day that holds significance as Burton's birthday. Metallica shared the news on Instagram with a photo of the certificate, thanking fans for honoring Cliff's life.

The effort to create an official holiday for Burton started as a Change.org petition created by diehard Metallica fans.

Burton appeared on some of Metallica’s most important albums, including Kill ‘Em All (1983), Ride the Lightning (1984), and Master of Puppets (1986).